महाभारतः mahābhārataḥ - book-12, chapter-315, verse-51

यं समासाद्य वेगेन दिशामन्तं प्रपेदिरे ।
दक्षस्य दश पुत्राणां सहस्राणि प्रजापतेः ॥५१॥

51. yaṁ samāsādya vegena diśāmantaṁ prapedire ,
dakṣasya daśa putrāṇāṁ sahasrāṇi prajāpateḥ.

51. yam samāsādya vegena diśām antam prapredire
| dakṣasya daśa putrāṇām sahasrāṇi prajāpateḥ

51. dakṣasya prajāpateḥ daśa sahasrāṇi putrāṇām
yam samāsādya vegena diśām antam prapredire

51. Having reached whom, the ten thousands of sons of Dakṣa, the Prajāpati (creator lord), swiftly traversed the ends of the directions.

Words meanings summery:

• यम् (yam) - whom

• समासाद्य (samāsādya) - having reached, having attained, having approached

• वेगेन (vegena) - with speed, swiftly, rapidly

• दिशाम् (diśām) - of the directions, of the quarters

• अन्तम् (antam) - the end, the limit, the boundary

• प्रप्रेदिरे (prapredire) - they reached, they attained, they went forth

• दक्षस्य (dakṣasya) - of Dakṣa

• दश (daśa) - ten

• पुत्राणाम् (putrāṇām) - of the sons

• सहस्राणि (sahasrāṇi) - thousands

• प्रजापतेः (prajāpateḥ) - of the Prajāpati (creator lord)

Words meanings and morphology

यम् (yam) - whom

(pronoun)

Accusative, masculine, singular of yad

yad - who, which, what (relative pronoun)

समासाद्य (samāsādya) - having reached, having attained, having approached

(indeclinable)

Absolutive (gerund)

Derived from the root 'sad' with prefixes 'sam' and 'ā'.

Prefixes: sam+ā

Root: sad (class 1)

वेगेन (vegena) - with speed, swiftly, rapidly

(noun)

Instrumental, masculine, singular of vega

vega - speed, velocity, impulse, force

Root: vij (class 6)

दिशाम् (diśām) - of the directions, of the quarters

(noun)

Genitive, feminine, plural of diś

diś - direction, quarter (of the world), point of the compass

Root: diś (class 6)

अन्तम् (antam) - the end, the limit, the boundary

(noun)

Accusative, masculine, singular of anta

anta - end, limit, boundary, death

प्रप्रेदिरे (prapredire) - they reached, they attained, they went forth

(verb)

3rd person , plural, active, perfect indicative (lit) of pad

Prefix: pra

Root: pad (class 4)

दक्षस्य (dakṣasya) - of Dakṣa

(proper noun)

Genitive, masculine, singular of dakṣa

dakṣa - Dakṣa (a Prajāpati, son of Brahmā)

दश (daśa) - ten

(numeral)

पुत्राणाम् (putrāṇām) - of the sons

(noun)

Genitive, masculine, plural of putra

putra - son

सहस्राणि (sahasrāṇi) - thousands

(noun)

Nominative, neuter, plural of sahasra

sahasra - thousand

प्रजापतेः (prajāpateḥ) - of the Prajāpati (creator lord)

(noun)

Genitive, masculine, singular of prajāpati

prajāpati - lord of creatures, creator, Prajāpati

Compound type : tatpuruṣa (prajā+pati)

• prajā – progeny, creatures, subjects
  noun (feminine)
• pati – lord, master, husband
  noun (masculine)